//
// Created by deepin on 2020/11/10.
//
#include <iostream>
using namespace std;
unsigned long left(unsigned long num , unsigned ct);
char * left(const char * str ,int n=1);
/*int main ()
{
  char *trip = "Hawaii!!";
  unsigned long n = 12345678;
  int i;
  char *temp;
  for (i=1;i<10;++i)
  {
    cout << left(n,i) << endl;
    temp = left(trip,i);
    cout << temp << endl;
    delete [] temp;
  }
  return 0;
}*/
/*
unsigned long left(unsigned long num , unsigned ct)
{
  unsigned digits = 1;
  unsigned long n = num;
  if (ct==0 || num==0) return 0;
  while (n/=10) digits++;
  if (digits>ct)
  {
    ct = digits-ct;
    while(ct--)num/=10;
    return num;
  }
  else
  {
    return num;
  }
}
char * left(const char * str ,int n)
{
   if (n<0)
     n = 0;
   char * p = new char[n+1];
   int i;
   for (i=0;i<n && str[i];i++) p[i] = str[i];
   while (i<=n) p[i++] = '\0';
   return p;
}*/
